Prospectus excerpt:  We are offering 6,000,000 shares of our 6.25% Series K Cumulative Redeemable Preferred Stock, which we refer to in this prospectus supplement as the Series K preferred stock. We will pay cumulative dividends on the Series K preferred stock from the date of original issuance at the rate of 6.25% per year of the $25.00 liquidation preference per share (equivalent to an annual rate of $1.5625 per share). Dividends on the Series K preferred stock will be payable quarterly in arrears on or about the last day of March, June, September and December of each year when and as declared by our board of directors, beginning June 28, 2013 with dividends accruing from, and including, March 15, 2013 to June 30, 2013. The Series K preferred stock will rank senior to our common stock, par value $0.01 per share, and our Series B preferred stock, and will rank on parity with our Series J preferred stock, with respect to dividend rights and rights upon liquidation, dissolution and winding-up.

Generally, we are not allowed to redeem the Series K preferred stock prior to March 15, 2018, except pursuant to the special optional redemption and REIT qualification optional redemption provisions described in this prospectus supplement. On or after March 15, 2018, we may, at our option, redeem the Series K preferred stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus all accrued and unpaid dividends on such Series K preferred stock up to but excluding the redemption date (referred to herein as the optional redemption). In addition, upon the occurrence of a change of control, as a result of which neither our common stock nor the common securities of the acquiring or surviving entity (or American Depositary Receipts, or ADRs, representing such securities) is listed on the New York Stock Exchange, or NYSE, the NYSE MKT LLC, or the NYSE MKT, or the NASDAQ Stock Market, or NASDAQ, or listed or quoted on a successor exchange or quotation system, we may, at our option, redeem the Series K preferred stock, in whole or in part within 120 days after the first date on which such change of control occurred, by paying $25.00 per share, plus any accrued and unpaid dividends to, but not including, the date of redemption (referred to herein as the special optional redemption). Further, if the redemption of a holder's Series K preferred stock is required to prevent a violation of our Ownership Limit (as defined herein), then we may, at our option, redeem the Series K preferred stock of such holder, in such amount required to preserve such qualification, for cash at a redemption price of $25.00 per share, plus all accrued and unpaid dividends to, but not including, the date of redemption (referred to herein as the REIT qualification optional redemption). If we exercise any of our redemption rights relating to the Series K preferred stock, the holders of Series K preferred stock will not have the conversion right described below.

The Series K preferred stock has no stated maturity and is not subject to mandatory redemption or any sinking fund. Holders of shares of the Series K preferred stock will generally have no voting rights except for limited voting rights if we fail to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other circumstances.